Paleontology of the Blaauwater 67 and 65 Farms, South Africa: Testing the Daptocephalus/Lystrosaurus Biozone Boundary in a Stratigraphic Framework
Vertebrate paleontologists have proposed a model for the terrestrial end-Permian event in the Karoo Basin, South Africa. The scenario envisions vegetational collapse that resulted in a phased extinction of vertebrate taxa in the uppermost Daptocephalus Assemblage Zone and overlying Lystrosaurus Asse...
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ftunivdallas:oai:utd-ir.tdl.org:10735.1/6006 2023-11-12T04:08:35+01:00 Paleontology of the Blaauwater 67 and 65 Farms, South Africa: Testing the Daptocephalus/Lystrosaurus Biozone Boundary in a Stratigraphic Framework Gastaldo, Roberta Neveling, Johann Looy, Cindy V. Bamford, Marion K. Kamo, Sandra L. Geissman, John W. Geissman, John W. 2017-06 application/pdf http://hdl.handle.net/10735.1/6006 en eng SEPM-Society for Sedimentary Geology http://dx.doi.org/10.2110/palo.2016.106 0883-1351 http://hdl.handle.net/10735.1/6006 Gastaldo, Roberta, Johann Neveling, Cindy V. Looy, Marion K. Bamford, et al. 2017. "Paleontology of the Blaauwater 67 and 65 Farms, South Africa: Testing the Daptocephalus/lystrosaurus Biozone Boundary in a Stratigraphic Framework." Palaios 32(6), 10.2110/palo.2016.106 349-366. 32 6 ©2017 SEPM (Society for Sedimentary Geology) Palaios Geology Stratigraphic—Permian Prince Charles Mountains (Antarctica) Karoo Basin (Lesotho and South Africa) Extinction (Biology) Landscapes Antarctica Climate Paleontology Stratigraphic—Triassic article 2017 ftunivdallas https://doi.org/10.2110/palo.2016.106 2023-10-23T05:23:38Z Vertebrate paleontologists have proposed a model for the terrestrial end-Permian event in the Karoo Basin, South Africa. The scenario envisions vegetational collapse that resulted in a phased extinction of vertebrate taxa in the uppermost Daptocephalus Assemblage Zone and overlying Lystrosaurus Assemblage Zone. These biodiversity patterns are placed into composite stratigraphic sections at key localities, several of which are in close spatial proximity. We present a stratigraphic framework at two of these localities, Old Lootsberg Pass and Tweefontein, physically correlated over similar to 2 km distance into which new and previously reported fossils are placed. Glossopterid-dominated megafloras occur in both the Daptocephalus and Lystrosaurus biozones, along with palynological assemblages. Katbergia, a burrow used by others as an indicator of the transition and post-transition interval, occurs in paleosols much lower in the upper Daptocephalus Assemblage Zone, along with various subhorizontal cylindrical structures interpreted as vertebrate burrows. New vertebrate specimens include: (1) a large skull of either Daptocephalus leoniceps or Dicynodon sp.; (2) a partial skull with large canine assignable to either Dicynodon, Daptocephalus, or Lystrosaurus mccaigi; (3) a Lystrosaurus canine in grayish-red siltstone; (4) a skull of Lystrosaurus murrayi; and (5) a non-diagnostic post-cranial skeleton of lystrosaurid affinity. These fossils are combined with the published Karoo-vertebrate dataset to test the stratigraphic position of the Daptocephalus and Lystrosaurus Assemblage Zone boundary. We conclude that: (1) glossopterids in the Lystrosaurus Assemblage Zone indicate persistence of the clade past what is considered to be an extinction event; (2) the presence of palynomorphs known from recovery clades above the proposed vertebrate-biozone boundary indicate that these groups were present in the basin, but outside of the megafloral taphonomic window; (3) the position of the proposed vertebrate assemblage-zone boundary ... Article in Journal/Newspaper Antarc* Antarctica Prince Charles Mountains Treasures @ UT Dallas Burrows ENVELOPE(163.650,163.650,-74.300,-74.300) Prince Charles Mountains ENVELOPE(67.246,67.246,-71.427,-71.427) PALAIOS 32 6 349 366 |
institution |
Open Polar |
collection |
Treasures @ UT Dallas |
op_collection_id |
ftunivdallas |
language |
English |
topic |
Geology Stratigraphic—Permian Prince Charles Mountains (Antarctica) Karoo Basin (Lesotho and South Africa) Extinction (Biology) Landscapes Antarctica Climate Paleontology Stratigraphic—Triassic |
spellingShingle |
Geology Stratigraphic—Permian Prince Charles Mountains (Antarctica) Karoo Basin (Lesotho and South Africa) Extinction (Biology) Landscapes Antarctica Climate Paleontology Stratigraphic—Triassic Gastaldo, Roberta Neveling, Johann Looy, Cindy V. Bamford, Marion K. Kamo, Sandra L. Geissman, John W. Paleontology of the Blaauwater 67 and 65 Farms, South Africa: Testing the Daptocephalus/Lystrosaurus Biozone Boundary in a Stratigraphic Framework |
topic_facet |
Geology Stratigraphic—Permian Prince Charles Mountains (Antarctica) Karoo Basin (Lesotho and South Africa) Extinction (Biology) Landscapes Antarctica Climate Paleontology Stratigraphic—Triassic |
description |
Vertebrate paleontologists have proposed a model for the terrestrial end-Permian event in the Karoo Basin, South Africa. The scenario envisions vegetational collapse that resulted in a phased extinction of vertebrate taxa in the uppermost Daptocephalus Assemblage Zone and overlying Lystrosaurus Assemblage Zone. These biodiversity patterns are placed into composite stratigraphic sections at key localities, several of which are in close spatial proximity. We present a stratigraphic framework at two of these localities, Old Lootsberg Pass and Tweefontein, physically correlated over similar to 2 km distance into which new and previously reported fossils are placed. Glossopterid-dominated megafloras occur in both the Daptocephalus and Lystrosaurus biozones, along with palynological assemblages. Katbergia, a burrow used by others as an indicator of the transition and post-transition interval, occurs in paleosols much lower in the upper Daptocephalus Assemblage Zone, along with various subhorizontal cylindrical structures interpreted as vertebrate burrows. New vertebrate specimens include: (1) a large skull of either Daptocephalus leoniceps or Dicynodon sp.; (2) a partial skull with large canine assignable to either Dicynodon, Daptocephalus, or Lystrosaurus mccaigi; (3) a Lystrosaurus canine in grayish-red siltstone; (4) a skull of Lystrosaurus murrayi; and (5) a non-diagnostic post-cranial skeleton of lystrosaurid affinity. These fossils are combined with the published Karoo-vertebrate dataset to test the stratigraphic position of the Daptocephalus and Lystrosaurus Assemblage Zone boundary. We conclude that: (1) glossopterids in the Lystrosaurus Assemblage Zone indicate persistence of the clade past what is considered to be an extinction event; (2) the presence of palynomorphs known from recovery clades above the proposed vertebrate-biozone boundary indicate that these groups were present in the basin, but outside of the megafloral taphonomic window; (3) the position of the proposed vertebrate assemblage-zone boundary ... |
author2 |
Geissman, John W. |
format |
Article in Journal/Newspaper |
author |
Gastaldo, Roberta Neveling, Johann Looy, Cindy V. Bamford, Marion K. Kamo, Sandra L. Geissman, John W. |
author_facet |
Gastaldo, Roberta Neveling, Johann Looy, Cindy V. Bamford, Marion K. Kamo, Sandra L. Geissman, John W. |
author_sort |
Gastaldo, Roberta |
title |
Paleontology of the Blaauwater 67 and 65 Farms, South Africa: Testing the Daptocephalus/Lystrosaurus Biozone Boundary in a Stratigraphic Framework |
title_short |
Paleontology of the Blaauwater 67 and 65 Farms, South Africa: Testing the Daptocephalus/Lystrosaurus Biozone Boundary in a Stratigraphic Framework |
title_full |
Paleontology of the Blaauwater 67 and 65 Farms, South Africa: Testing the Daptocephalus/Lystrosaurus Biozone Boundary in a Stratigraphic Framework |
title_fullStr |
Paleontology of the Blaauwater 67 and 65 Farms, South Africa: Testing the Daptocephalus/Lystrosaurus Biozone Boundary in a Stratigraphic Framework |
title_full_unstemmed |
Paleontology of the Blaauwater 67 and 65 Farms, South Africa: Testing the Daptocephalus/Lystrosaurus Biozone Boundary in a Stratigraphic Framework |
title_sort |
paleontology of the blaauwater 67 and 65 farms, south africa: testing the daptocephalus/lystrosaurus biozone boundary in a stratigraphic framework |
publisher |
SEPM-Society for Sedimentary Geology |
publishDate |
2017 |
url |
http://hdl.handle.net/10735.1/6006 |
long_lat |
ENVELOPE(163.650,163.650,-74.300,-74.300) ENVELOPE(67.246,67.246,-71.427,-71.427) |
geographic |
Burrows Prince Charles Mountains |
geographic_facet |
Burrows Prince Charles Mountains |
genre |
Antarc* Antarctica Prince Charles Mountains |
genre_facet |
Antarc* Antarctica Prince Charles Mountains |
op_source |
Palaios |
op_relation |
http://dx.doi.org/10.2110/palo.2016.106 0883-1351 http://hdl.handle.net/10735.1/6006 Gastaldo, Roberta, Johann Neveling, Cindy V. Looy, Marion K. Bamford, et al. 2017. "Paleontology of the Blaauwater 67 and 65 Farms, South Africa: Testing the Daptocephalus/lystrosaurus Biozone Boundary in a Stratigraphic Framework." Palaios 32(6), 10.2110/palo.2016.106 349-366. 32 6 |
op_rights |
©2017 SEPM (Society for Sedimentary Geology) |
op_doi |
https://doi.org/10.2110/palo.2016.106 |
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PALAIOS |
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32 |
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6 |
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349 |
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366 |
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